Registering-meter for gas and the like.



WTNESSES:

Mm@ WM J. M. RUSBY.

REGISTERING METER FOR GAS AND THE LIKE.

APPLICATION FILED JAN.6,1911,

Patented July 28, 1914,

2 SHEETS-SHEET 1..

J. M. RUSBY.

BEGISTERING METER FOR GAS AND THE LIKE.

APPLICATION FILEDv JAN.6, 19114 1 1 05,58 1. Patented July 28, 1914.

2 SHEETS-SHEET 2.

ooo o ooo o oo o o on `s W/T/VESSES:

D sTATEsPATENT OFFICE. i

JOHN M. RUSBY, OP PHILADELPHIA, PENNSYLVANIA, AssIGNoR To THE UNITED GAsIMPROVEMENT COMPANY, or PHILADELPHIA, PENNSYLVANIA, A CORPORATION OFPENNSYLVANIA.

REGISTERING-METER FOB. GAS AND THE LIKE.

To all whom t may concern.'

Be it knwn 'that I, JOHN M. RUSBY, a citizen of the United States,residing at the cit of Philadelphia, in the county of Philade phia andState of Pennsylvania,have invented a new and useful Registering-Meterfor Gas and the like, of which the following is a specification.

The principal object of the present invention is to rovide an accurate,compact and comparatively inexpensive meter for measuring andregistering the passage of large' quantities of gas, air or the like andadapted for use as a station meter as well as for other purposes.

The invention will be claimed at the end Y' hereof but `will first bedescribed in connection with the embodiments selected among otherembodiments for purposes of illustration in the accompanying drawings inwhich- Figure 1, is a view more or less diagrammatic principally incentral section illustrating apparatus embodying features of theinvention. Fig. 2, is a similar View illustrating apparatus embodying amodification of the invention, and Fig. 3, is a diagrammatic viewhereinafter referred to.

Referring to Fig. 1, 1, is a Venturi meter which I believe to be themost suitable and accurate form of meter known, and while it isespecially advantageous, still I do not desire to exclude from myinvention the use of some other type of meter. 2,'is another and smallerVenturi meter bu't as is the case with the meter 1, it might be replacedby another type of meter although I believe the Venturi type to be themost accurateand for most uses the best. The Venturi meters 1 and 2, aredesigned to pass proportionate volumes when the differential pressuresbetween their mouths 3 and 4, and throats 5 and 6, are the same. Themeter 1, is interposed in the pipe or conduit 7, land the meter 2, isinterposed in the by-pass or lbranch tube or con-v duit 8. The mouths 3and 4, of the 'Venturi tubes "communicate with a header9, applied tothe-"gas conduit or passage 7.. 10,- is a registering meter interposedin-the branch or by-pass 8, and Yit serves to fmeasurethe quantityof-flow through that branch vorbypass. This registering meter 1Q,y is.shown as of the wet drum varietybut other types may be used. Theregistering meter since Specification of Letters Patent.

Application led January 6, 1911.

Patented July 2s, 1914.

Serial No. 601,093.

itis tol measure but a small proportionate part of the total flow may becomparatively small and therefore inexpensive and easy ,to maintain. 5,extends a pipe connection 12, in which there is interposed a gage 11, bymeans of which, the differential pressure between the mouth and throatofthe Venturi meterv 1, can be read. Similarly the age 13, connected bypipes 14 and 15, with the mouth and throat of the Venturi meter 2,serves to measure the differential pressure of that meter. At the mouthof the meter 1, are arranged radial openings 16, that extend through thewall and communicate with an annular chamber 17, to which the requiredpipe connections are made. The construction at the throats of bothmeters and at the mouth of the meter 2, is the same and therefore neednot be specifically described. The purpose is to Obtain accuracyand'avoid the possible effect o f local currents. The pro- F rom themouth, 3, to the throat portionate rate of flow for whichthe meters 1and 2, are designed remains constant so long as the differentialpressure of each of the meters 1 'and 2, is the same. However,

the registering meter 10, operates asaresistancein respect to the meter2, and this resistance varies, for exampleilwith the speed 18,isinterposed in the pipe 7 ,and the arm 19, is 'connected with itsspindle, so thatby Yturning thearm 19, tlm-damper 18 is turned,

and it may-b Iremarked that a damper iis notthe only ind-ofvariableresistanthat can fbe employed. An' exam leg of a differential appliancewill be describe 20 and 21, are invertelabeI-ls.

attached 'to theends of l,the centrallypivcted beam 22; andi-they arearranged to mbe appropriate fsealsjs anfd 8.1.1 The beam '22,y

is provided rwithan arm 23,' tha-tis connect-y ed by an adjustable linjk.24, ,with ytherarna 19. From! the throatofthe-Venturi tube 2'-, extendsa -pipe 25, vthat'-dischajfrges, yinto the bell 20,.'and fromthe throatofthe-Venturi sates for and balances the resistance of the.

met-er 10, and thus the pressures at the throats 5 and 6, are kept equalor if they become unequal they are immediately made equal, and since themouths 3 and 4, communicate with the headerv9, the pressures4 on themouths are equal, 'consequently the difference in pressure between themouth and the throat or the differential pressure of each Venturi isequal or if the equality is disturbed as by a change of quantity of owit is immediately restored; 'this' being so the proportionate `flow'through the two' Venturi meters is maintained. If the proportion isnine for the Venturi l, and one for the Ventpri 2, then the readin 'ofthe meter 10, multiplied by ten is the ow through the pipes 7 and 7,that is, the tot-al flow.

To adjust the apparatus reference is made to the gages 11 and 1?', and`the adjustable link Q/i, is adjusted until the reading of the two gagesis the same, that is, until the dif- `ferential of the meters 1 and 2,is the same. In use if the pressure at the throat 6, should increase,the bell 20, will rise and shift the arm 19, toward the right, thusclosing the damper 18, more or less, so that the pressure at the throat5, will rise, and in this way the pressures at the two throats are keptequal or if the pressures at the two throats become unequal suchinequality is more a tendency than a factand b it the equality issubstantially maintaine and since the pressure at the two mouths is theSame, the differential for both meters 1 and 2, is the same andconsequently the proportionate flow is maintained. Similarly the 'bell20, may fall when' the pressure at i',hroat'f,V` is less than at 'throat5, thus' moving'the arm 19, toward vthe left and opening the damper 18,more or less. The movement of the-'arm 19, isV responsive to differencein pressure at the "throats of the meters ,1' and 2, and operates tokeep the pressures at' both throats equal or if they become unequal torestore equality.

The construction and mode of operatin ofthe apparatus shown in Fg.f2,are the same as described in connection with'Fig. 1, except that disks 1and 2*,each provided with a central opening are interposed in the pipes7 and 8, instead of Venturi meters and a dry registering meter 1D, isshown instead of the wet drum meter 10. While the disks 1a 4and2,constitute in connection with gages, means for measuring the flow of gasor the like said gas, etc., in passing them loses pressure, Whereas withthe Venturi meters the pressure Vis restored. The ow through a Venturimeter depends upon the square root of the di'erentialpressure on itsmouth and throat, so that to obtain extreme accuracy' the dierentialpressure should be as large as is convenient. To this end and in somecases I may .employ several Vent-uri tubes 1, in parallel instead of onebetween the header 9, and pipe 7, as shown in Fig. 3, and all but one ofthese Venturi tubes may be provided with valves, 27 so that when theflow is not large the valves 27, may be closed thus cutting out certainVenturi tubes and increasin the flow through and diii'erential pressureof the one that is not cut out. Of course in this case in computingtotaliiow regard must be had to the number of Venturi tubes in service. Ifthe resistance ofthe meter 10 or l()a varies, for example, by a changein its speed, as has been mentioned, it follows that this change inresistance of the meter will destroy the equality of the pressures atthe throats 5 and 6 dr 1a and 2*. The difference in pressure operates onthe bells 20 and 21, thus shifting the device 18. The parts, of course,remain in this new position until the resistance of the meter 10 and 10aagain changes, when there is established a'- new adjustment. The speedand resistance of the meter 10 or 10 change because the volume of gas orother substance flowing through the device as a whole, varies orchanges; that is, if the flow increases the speed of the meter increasesand its resistance increases and if the iiow decreases the speeddecreases and the resistance de'creases.

yWhat I claim is: v

L A meter comprising the combination of valveless proportional measuringdevices arranged in parallel,' a registering meter operatively arrangedin respect to one of said devices, and a variable resistance arrangedfor ooperation with 'thev other of said devices and vresponsive tovariation in the differential pressures existing in said devices due tochanges in iow and adapted to restore saidv devices to the "same workingcondition by balancing its resistance with of the registering meter.

3. lIna registering meter the combination of valveless proportionalmeasuring devices, and means operated by a `departure from equalityinthe drop in pressure of said? devices and adapted to automaticallyequalize the drop of pressure in each device, thereby keeping the samesubstantially equal.

4. In a registering meter the combination of valveless proportionalmeasuring devices, a register for one of said devices, and meansresponsive to inequalities between the drop of pressure at each deviceand adapted to restore and keep the same drop of pressure at each ofsaid devices.

5. A meter comprising the combination of valveless proportionalmeasuring devices respectively provided with gages for measuring theirdrops of pressure, a re 'stering meter connected with one of saidevices, a resistance connected with the other of said devices, andadjustable differential means responsive to diierence in drop ofpressure on the devices and adapted to operate said resistance,substantially as described.

6. `In a registering meter the combination of valveless proportionalmeasuring devices,-

a header to which said devices are connected whereby the inlet pressureis the same on each devi a register connected with one of said devices,a resistance connected with the other of said devices, and means ada tedto vary said resistance and responsive to diiierences in pressure on theoutlet side of said devices and adapted to equalize the pressure on theoutlet side of each device.

7. In a meter the combination of valveless proportional measuringdevices, a register for one of said devices, an automatic resistance forthe other of said devices, and means responsive to pressure changesbetween said devices and adapted to make the pressure on both devicesthe same, substantially as described.

8. In a meter the combination of valveless proportional measuringdevices, a registering meter connected with one of said devices, aresistance for the other of said devices, and differential actuatingmeans for automatically changing .,said resistance to balance it withthe resistance of the registering meter, substantially as described.

9. In a meter the combination of valveless proportional measuringdevices, a registering meter connected with one of said de vices, aresistance for the other of said devices, power appliances connectedrespectively with the outletv pressure portions of said devices, andconnections between the power ap liances and the resistance for varyingt e latter, substantially as described.

10. A meter comprising the combination of proportional Venturimeters, aregistering meter through which one of the Venturi meters discharges, avariable resistance for the discharge of the other Venturi meter, andldiferentia pressure actuatingmeans responsive to. diierence in pressureat the throats of theVenturi meters and adapted automatically to varysaid resistance to balance it with the resistance of the registeringmeter when the throat pressures differ and to restore and maintain thesame pressure at the throats of both Venturi meters.

11. A meter comprisi? of two proportional enturi meters, a headerdischarging into the mouths of both Venturi meters whereby the inletpressure is the same on each, a registering meter through which thesmaller Venturi meter discharges, and an automatic resistance and itsoperating pressure connection for the large Venturi meter whereby throatpressure of the two Venturi meters is maintained the saine,substantially as described.

12. In a meter the combination of a header, proportional Venturi metersthrough which the header discharges, a registering meter through whichone of the Venturi meters discharges, a resistance for the other Venturimeter, a differential pressure appliance for varying said resistance,and connections from the throats of the Venturi meters to thedifferential pressure appliance, -substantially as described.

In testimony whereof I have hereunto signed my name.

JOHN M. RUSBY.

Witnesses:

K. M. GiLLicAN, S. E. PATTERSON.

the `combination

